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Event ID 1027: DNS Name resolution for the name, …, failed because the client was unable to contact DNS servers

Windows Event ID Lookup: What Windows event IDs mean: 4625, 4624, 4740, 6008, 41, 7045, 1102 and 3,000 more, with Windows' own message text, the fields and what to check.

Look up a Windows event ID from Event Viewer, a SIEM alert or a log export: what it means, the fields it records, and what to check. Many IDs are used by more than one source (event 41 is both a Kernel-Power crash and a boot error), so every definition is shown, the one people usually mean first. The message text is Windows' own, read from the event providers of Windows 10.0.26200.0, 2026-10-28; the notes are ours, based on Microsoft's security auditing reference.

Try: 4625, 4624, 4740, 6008, 41, 1074, 7045, 1102, 4104, 1149

DNS Name resolution for the name, …, failed because the client was unable to contact DNS servers.

Event 1027
DNS-Client
System log
Information
Message and fields (as Event Viewer shows them) 
DNS Name resolution for the name, …, failed because the client was unable to contact DNS servers. At least one of the interfaces is not in a private network and name resolution will not fall back to LLMNR or NetBIOS. Client PID …. Query Blob …

The file and printer sharing firewall ports are currently closed.

Event 1027
SMBServer
SMBServer/Operational log
Information
Message and fields (as Event Viewer shows them) 
The file and printer sharing firewall ports are currently closed.  This is the default configuration for a system that is not sharing content or is on a Public network.

Guidance:

You should expect this event when Windows Firewall is not configured to enable the File and Printer Sharing rule, which allows inbound SMB traffic. This event occurs on a computer that does not have custom shares configured. Clients cannot access SMB shares on this computer until SMB traffic is allowed through the firewall.